If I have a H code car it should be 351C 2V. My heads are 4V's. Would that pretty much suggest that someone put different heads on at some point? Would it also be 351 CJ heads? Could the heads have come from a non Mustang engine? The 4 is stamped on the inside corners of the heads by the valve cover lips.

Yes, someone could have replaced the 2V heads with 4V heads but it is also entirely plausible that they came from the factory that way - - it is not an unheard of occurrence.

Since the car is a '72, it is very likely that they are CJ heads but keep in mind that the CJ heads have the EXACT same specifications as the 4V heads in 1972.

And Yes, your heads could be from a non-Mustang, especially if they were replaced by a previous owner. That having been said, it does not matter as the heads are the same across the Ford/Lincoln/Mercury lines.

As TNFASTBK stated above, check the casting number on the heads as they will tell you what you have.

(10-26-2010, 08:43 AM)cobra3073 Wrote: Yes, someone could have replaced the 2V heads with 4V heads but it is also entirely plausible that they came from the factory that way - - it is not an unheard of occurrence.

Since the car is a '72, it is very likely that they are CJ heads but keep in mind that the CJ heads have the EXACT same specifications as the 4V heads in 1972.

And Yes, your heads could be from a non-Mustang, especially if they were replaced by a previous owner. That having been said, it does not matter as the heads are the same across the Ford/Lincoln/Mercury lines.

As TNFASTBK stated above, check the casting number on the heads as they will tell you what you have.

Hope this helps.

BT

Thanks for the help guys. Another question I need answered is where is the ID #s for the heads? I would also like to identify the block. Can you tell me where the numbers are located? Is it possible to find out if the motor and heads are original to each other or not.

The guy painted the car and took off the tag on the door. I'm not sure if there are any more identification labels on the car. Again the Vin states an H code. I am pulling the motor this winter and will check the main caps since I am replacing the oil pan. That may help me determine what it exactly is.

Thanks

(10-26-2010, 05:08 AM)Tnfastbk Wrote: If you can find a part number on them:

(10-26-2010, 08:43 AM)cobra3073 Wrote: Yes, someone could have replaced the 2V heads with 4V heads but it is also entirely plausible that they came from the factory that way - - it is not an unheard of occurrence.

Since the car is a '72, it is very likely that they are CJ heads but keep in mind that the CJ heads have the EXACT same specifications as the 4V heads in 1972.

And Yes, your heads could be from a non-Mustang, especially if they were replaced by a previous owner. That having been said, it does not matter as the heads are the same across the Ford/Lincoln/Mercury lines.

As TNFASTBK stated above, check the casting number on the heads as they will tell you what you have.

Hope this helps.

BT

Thanks for the help guys. Another question I need answered is where is the ID #s for the heads? I would also like to identify the block. Can you tell me where the numbers are located? Is it possible to find out if the motor and heads are original to each other or not.

The guy painted the car and took off the tag on the door. I'm not sure if there are any more identification labels on the car. Again the Vin states an H code. I am pulling the motor this winter and will check the main caps since I am replacing the oil pan. That may help me determine what it exactly is.

Thanks

(10-26-2010, 05:08 AM)Tnfastbk Wrote: If you can find a part number on them:

D1AE-6090-AA 71-74 351C 2v
2V heads

Valves 2.04, 1.65

64cc

In port 2.02 x 1.65

Ex port 1.84 x 1.38

D1AZ-6049-A

D1AE-CB 71-74 351C 2v
2V heads

Valves 2.04, 1.65

64cc

In port 2.02 x 1.65

Ex port 1.84 x 1.38

D1AZ-6049-A

D1AE-GA

71 351C Mustang Torino

Valves 2.19, 1.71

64cc (Closed chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1AZ-6049-B

D1AE-GA

71 B0SS 351 Mustang

Screw in Studs w/Guide plates

Valves 2.19, 1.71

75.4cc (Closed chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1ZZ-6049-B

D1OE-6090-AB 71 302

D1OZ-6049-A

D1ZE-DA

71-72 351CJ

71 351C
Valves 2.19, 1.71

73-76cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1ZZ-6049-C

D2OE-AB 72 460 Police Interceptor

D2OE-BA 72-74 302

Valves 1.78, 1.45

58.2cc

D2OZ-6049-B

D2ZE-A 72 351 HO

Valves 2.19, 1.71

75cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D2ZZ-6049-A

D3ZE-AA 73-74 351CJ

4V heads

Valves 2.04, 1.66

75.4cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D3ZZ-6049-A

Good info..Thanks!

You have to pull the intake and use a mirror or take a "rubbing" with a piece of paper and a pencil because the numbers are on the underside of the head. The date codes are visible by removing the valve covers and if they indicate they were made in 1970 or late 69 you can be sure they are closed chamber heads. Date code of 71 and they could be either open or closed chamber. Date code after 71 will be open chamber.

To piggy back on Tommy's post, the casting numbers on the heads are usually located under the intake ports, probably the 2nd and 3rd port. As Tommy stated, you probably will need to remove the valve cover and take a mirror to see the numbers if the heads are still on the block. Usually the first four letters/numbers (possibly D1AE) will be under one port and the suffix (possibly GA) will be under the other port.

The casting numbers for the block are located under the rear of the right (passenger side) cylinder bank. The date code for the block will be underneath the casting number and will be a 3 or 4 digit/character number. I suspect your block will have a casting number of D2AE-CA. As stated, the date code should be located under this casting number.

At any rate, once you have these numbers, please post them up and we can tell you what you have for sure.

(10-30-2010, 04:55 PM)cobra3073 Wrote: Sorry for just getting back to you on your additional questions.

To piggy back on Tommy's post, the casting numbers on the heads are usually located under the intake ports, probably the 2nd and 3rd port. As Tommy stated, you probably will need to remove the valve cover and take a mirror to see the numbers if the heads are still on the block. Usually the first four letters/numbers (possibly D1AE) will be under one port and the suffix (possibly GA) will be under the other port.

The casting numbers for the block are located under the rear of the right (passenger side) cylinder bank. The date code for the block will be underneath the casting number and will be a 3 or 4 digit/character number. I suspect your block will have a casting number of D2AE-CA. As stated, the date code should be located under this casting number.

At any rate, once you have these numbers, please post them up and we can tell you what you have for sure.

Hope this helps.

BT

OK Thanks for the help. I'm sure I will have questions when I "get at it"

The weather is turning up her in NH. Getting close to taking the last ride of the season and then the work begins. Just built a garage 48' x 26'. Looking forward to getting the garage doors on in a couple of weeks so I can insulate and get the heat installed. Have to fix the cowl this winter...not looking forward to doing it but it needs to be done. I'm going to pull the engine and dress it up and spray the engine bay. Hopefully next spring it will be pulled together. Wishful thinking!

(10-30-2010, 12:59 PM)TommyK Wrote:

(10-27-2010, 07:25 AM)Darren 72 Wrote:

(10-26-2010, 08:43 AM)cobra3073 Wrote: Yes, someone could have replaced the 2V heads with 4V heads but it is also entirely plausible that they came from the factory that way - - it is not an unheard of occurrence.

Since the car is a '72, it is very likely that they are CJ heads but keep in mind that the CJ heads have the EXACT same specifications as the 4V heads in 1972.

And Yes, your heads could be from a non-Mustang, especially if they were replaced by a previous owner. That having been said, it does not matter as the heads are the same across the Ford/Lincoln/Mercury lines.

As TNFASTBK stated above, check the casting number on the heads as they will tell you what you have.

Sounds easy enough. Thanks for the help!

Hope this helps.

BT

Thanks for the help guys. Another question I need answered is where is the ID #s for the heads? I would also like to identify the block. Can you tell me where the numbers are located? Is it possible to find out if the motor and heads are original to each other or not.

The guy painted the car and took off the tag on the door. I'm not sure if there are any more identification labels on the car. Again the Vin states an H code. I am pulling the motor this winter and will check the main caps since I am replacing the oil pan. That may help me determine what it exactly is.

Thanks

(10-26-2010, 05:08 AM)Tnfastbk Wrote: If you can find a part number on them:

D1AE-6090-AA 71-74 351C 2v
2V heads

Valves 2.04, 1.65

64cc

In port 2.02 x 1.65

Ex port 1.84 x 1.38

D1AZ-6049-A

D1AE-CB 71-74 351C 2v
2V heads

Valves 2.04, 1.65

64cc

In port 2.02 x 1.65

Ex port 1.84 x 1.38

D1AZ-6049-A

D1AE-GA

71 351C Mustang Torino

Valves 2.19, 1.71

64cc (Closed chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1AZ-6049-B

D1AE-GA

71 B0SS 351 Mustang

Screw in Studs w/Guide plates

Valves 2.19, 1.71

75.4cc (Closed chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1ZZ-6049-B

D1OE-6090-AB 71 302

D1OZ-6049-A

D1ZE-DA

71-72 351CJ

71 351C
Valves 2.19, 1.71

73-76cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D1ZZ-6049-C

D2OE-AB 72 460 Police Interceptor

D2OE-BA 72-74 302

Valves 1.78, 1.45

58.2cc

D2OZ-6049-B

D2ZE-A 72 351 HO

Valves 2.19, 1.71

75cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D2ZZ-6049-A

D3ZE-AA 73-74 351CJ

4V heads

Valves 2.04, 1.66

75.4cc (Open chamber)

In port 2.50 x 1.75

Ex port 2.00 x 1.74

D3ZZ-6049-A

Good info..Thanks!

You have to pull the intake and use a mirror or take a "rubbing" with a piece of paper and a pencil because the numbers are on the underside of the head. The date codes are visible by removing the valve covers and if they indicate they were made in 1970 or late 69 you can be sure they are closed chamber heads. Date code of 71 and they could be either open or closed chamber. Date code after 71 will be open chamber.